Log Message:
Update p5-Convert-TNEF to 0.17, changes are:
0.17  Sun Feb 24 2001
        - It appears that messages no longer need start with a
          TnefVersion attribute, and a message without this attribute
          triggered a bug ('datahandle' method called on uninitialized
          value) found by Randy Diffenderfer.
        - Although the MSDN TNEF Stream syntax page makes it look like
          TnefVersion must be the first attribute if it appears, and
          MessageClass must be the first or second attribute if it
          appears, I'm not going to check for this because then my
          test file has MessageClass as the third attribute.
        - Got rid of '_equal' function. The only reason to worry about
          warnings when comparing undef is if there's a read error, and
          then a warning ought to be ok anyway.
        - Long overdue perltidy format cleanup.
0.16  Tue Jul 31 2001
        - Simplified main loop some more. Don't need to check for end
          of processing twice.
        - Prefixed 'private' functions with underscore character.
        - changed a couple of 'methods' which didn't use '$self' and weren't
          documented as methods into 'private' functions.
0.15  Tue Jul 31 2001
        - Finally combined message and attachment parsing loops.
        - Removed the '|| []' from the attachment() method. I'm storing
          an arrayref unconditionally in the TNEF object, so there should
          be no need for this. Also now returns ref if not called
          in list context.
0.14  Mon Jul 30 2001
        - Subclass message and attachment portions of TNEF object.
        - Found bug in saving the size of message attributes.